"David J Taylor" <david-tay...@blueyonder.not-this-bit.nor-this.co.uk.invalid> writes:
>"Unruh" <> wrote in message news:vcjhm.50153$db2.9...@edtnps83... >[] >>>UK 60KHz radio time signal. >> >> Ah, OK. Its accuracy is probably not much better than a few msec I >> assume. >> GPS is a few usec. Since the network gives accuracies of better than a >> few ms, MSF >> is not a good way of testing the accuracy of network set clocks. >At source, it's recently been within about 10 microseconds: Sorry, at 10usec, the distance away of the transmitter must be less than 3 km. Also your system needs to see the start of the tone to 10usec which means that the tone would have to be about 1MHz which is a bit beyond audio. > > http://www.npl.co.uk/science-technology/time-frequency/time/products-and-services/msf-bulletins > http://resource.npl.co.uk/time/bulletins/msf/msfbul_08_2009.pdf >In the field, the accuracy will depend on the receiver you use, the >propagation, and the quality of signal you have. A few milliseconds is >probably a fair estimate, although it would be interesting to see some >measured values. >Cheers, >David _______________________________________________ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions
